Grinding-machine.



w; 'c. OSVTERHOLM.

GRINDING MACHINE APPLICATION FILED NOVZO, 1915.

Patented June 19; 1917.

6 SHEETS-SHEET l.

Men/Z07.

w, c. OSTERHOLM. IGIUNDING MACHINE. APPLICATION FILED NOV-20. I915.

Patnted June 19, 1912.

ss EET's-sHEET 2.

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w. c. OSTERHOLM. .GRINDING MACHINE.

APPLICATION FILED NOV-20,. 91b.

Patented J une 19, 1917.

6 S HEETSSHEET 3-" Patented 11111619, 191?.

P II HI I I W. C. OSTERHOLMQ GRIND 1N6 MACHlNE.

APPLICATION! FILED NOV. 20 1915.

W. C. OSTERHOLM.

GRINDING MAcHmEJ APPHCAT 1 1 FILED NOV-20.19%.

Patnfed June 19, 1917.

61SHEETS-SHEET 6.

?(iiZFia-na 5 UNXTED TATE PATENT WILLIAM C. OS'IERHOLM, OF CHICAGO, ILLINOIS, ASSIGNOR T INTERNATIONAL HARVESTER COMPANY OF NEW JERSEY, A CORPORATION OE NEW JERSEY.

GRINDING-MACHINE.

Application filed November 20, 1915.

State of Illinois, have invented certain new and useful Improvements in Grinding-Machines, of which the following is a full, clear,

and exact specification.

My invention relates to grinding-machines in general, and is adapted in particular for beveling the edges of sickle sections for harvesting and mowing machines.

The object of the invention is toimprove and simplify grinding machines whereby operations thereof are automatic; for example, automatic in the action of grinding the applied blanks to a cutting edge by passing them in opposite directions across the face of a rapidly rotating ring stone and progressively advancing the blanks in the direction of the stone by. accurately graduated steps at each pass as the beveled edgesare caused to assume a finished form; to provide m1- crometer mechanism for adjusting thehead, into which the stone carrying spindle is jourpaled, toward the blank carrying head; to provide an automatically operative blank receiving and clamping head having connection with a source of cooling water supply whereby the flow of water to the head is controlled in an intermittent manner deter-- mined by the movement of the head from an inoperative to an operative position, and to direct the flow of water from the head upon the blank and stone in a manner to prevent undue heating of the blank during the winding operation, and to operate as a blank releasing element as the head recedes to its initial and inoperative position.

These objects are attained by meansjof the mechanism illustrated in the accompanying drawings, in which- Figure l is a side elevation of azgrinding machine embodying my invention;

Fig. 2 is a front elevation of Fig. 1;

Fig. 3 is a rear end elevation partly in section, of Fig. 1;

Fig. 4 is a reversed sectional elevation of part of Fig. 3, taken in the plane of line 4-4 of Fig. 1, designed to illustrate the cons'truction of the cam mechanism for controlling the vibratory movement of the blank carrying head across the stone;

' Fig. 5 is a development of a face cam for controlling the movement of the blank car- Specification of Letters Patent.

Patented June 19, 191%.

Serial No. 62,459.

rying head in a step by stepmanner toward the stone as partly shown in Fig. 3;

Fig. 6 is a sectional side elevation of the micrometer stone adjusting mechanism;

Fig. 7 is alongitudinal sectional elevation of parts of the machine;

Fig. 8 is a sectional end elevation of a detached detail of part of the machine de signed to illustrate the construction and operat on of the blank carrying head;

F1g.. 9 is a reversed view of Fig. 8;

Fig. 10 is a-vertical section of the blank carrying head .and part of the cooling water supply mechanism;

Fig. 11 is a rear elevation of the blank carrying head;

Fig. 12 is top view of a part of Fig. 11;

Fig. 13 is a face View of part of the blank holding means as shown in Fig, 11; and

Fig. 1e is a sectional detail of an automatically controlled valve forming part of the cooling water supply mechanism.

Referring to the drawings, wherein the same reference numerals designate like parts throughout the several views, 1 represents the main frame of the machine, having side" walls 2, a front end wall 3, and base members t whereby it be secured to the floor. The upper wall of the frame includes longitudinally disposed angular ways 5 upon opposite sides of its longitudinal center,

upon which is slidably mounted 'a head mem her 6, having journal bearings 7, in which is journ'aled a spindle 8 provided with a stone receiving member 8' on its front end, in which is mounted an abrasive stone 9' having a ring form, and 10 represents a driving pulley secured to the shaft. Means are provided for adjusting the head longitudinally upon the frame including a shaft 11, having one end threaded into the head and secured by means of a locking nut 12. 13 represents a forwardly extending bracket member secured to the front wall of the main frame, to the front end of which is secured a cupshaped bearing member 14-, in which is ournaled a threaded sleeve 15, having a flange 16 upon its rear end that is received by a counterbore in the member 14, and l6 represents a collar secured to the bearing mem her by means ofcap screws 17 and opera; tive to prevent alongitudinal movement of the sleeve Within the bearing member. The shaft 11 is threaded throughout the greater part of its length and receives the sleeve 15,

, l?) upon its opposite sides that t and represents a non-corrosive tube havinc its war end secured to the shaft by means of a pin 19. and its front end telescopically received by the rear end oi a simi lar tube having its front end received by an axial opening; in the collar member 16h e tube operating to shield the shaft in any position of its adjustment.

Secured to the sleeve 15 is a toothed wheel 20, upon the hub of which journaled a casing 21, that incloses the wheel, and represents a hearing sleeve threaded 'upon the front end of the sleeve 15, upon which is ro tatably mounted the hub member 23: ot hand lever :24, having a concentric web member 25 whereby the lever secured to the casing 26 represents a rocking detent arm pivotally mounted upon the lever 24: by means of a pivot pin 27, having a rearwardly extending" arm 28 adapted to engage witl the toothed rim of the wheel 20, and a he member 29 that engages with a spring? pressed plunger 30 woereby the arm 28 is caused to normally engage with the teeth upon the rim of the wheel. 31 represents a forwardly extending tubular hand piece integrally connected with the free end of the lever, and pivoted/therein is a thumb controlled lever 3:2 that is operatively connected with the detent 26 by means of a link 34 represents a barrel member carried by the casing 21, and 31 a spring-pressed detent received by the barrel and adapted to engage with radially disposed ribs 36 integral with the bearing member l-l in a manner to limit an angular movement of the hand lever in opposite directions, it being provided with a head 3? at its front end whereby it may be drawn forward to disengage it from the link iting ribs when it is desired to permit greater angular movement of the hand lever and its associated parts.

The stone adjusting mechanism dcscribed operates as a ratchet adjustment upon the sleeve 15 and controls a longitudinal movement Ofi'llG shaft ll in opposite, dirertions in an accurate and measured throw manner. I

38 represents a longitudinally disposed bearing sleeve preferably integral with the base of the main frame 1 of the machine. and extending beyond the front wall thereof receives a bushing 39 at its front end and a similar bushing 40 at its rear enih and e'l-l represents a hollow rockable cylinder journaled therein and provided w'th a flanged head 4-2 that overlaps the front end of the bushing 39 and bearing sleeve 38. Secured to the. flanged head of the cylinden by means of bolts 4:3, is a radially disposed arm 44. having forwardly extending parallel ribs minate at ,nding boss ed a rock shaft is a their upper ends in inwardly cf members 46, in which. is y; shah. Secured to the rock.

blank carrying head 48 including a forwardly e: ending arm 4:9, to which is pivotally connected a yoke member 50 by means oi? a pin 51, the yoke being provided with upwardly and forwardly extending arms 52 carrying at their free ends an adjustable contact screw The blank carrying head 48 is provided with a cylindrical transversely disposed water receiving chamber 54, having elongated outlet ports in its rear wall and communicating with a source water supply under pressure by. means of valve hose mechanism including a faucet member 56, and having a threaded shank 57 secured in an opening through one of the end walls of the chamber 5+: and a barrel member 58 that operatively receives a valve 59 provided with a stem 60 slidably received by an opening in the wall of the faucet member. The valve is normally held closed by means of a comprcssion spring 61, having one end received by a hollow extension 62 of the valve, and its opposite end engaging with a removable end wall 63 of the faucet member. 6a: represents a laterally extending hollow branch integral with the faucet member and provided with a series of ports 65 through its side walls that communicate with an annular chamber G6 in the head 67 that is rotatably mounted upon the branch 84 and provided with a hollow stem 68 whereby a hose 69 may connect the head with a source of water supply, and 70 represents a striding box member screw threaded into the end of the branch and yieldingly pressing the head lon- 100 gitudinally thereon by means of an inclosed compression spring 71. p

72 represents a blank carrying block secured to the rear side of the head 48 by means of cap screws 73 and provided with 05 openings 74: communicating with the outlet ports of the chamber 5%. The rear blank receiving face of the block 72 is inclined downward and forward, having a degree of inclination that is desired to give a chosen degree of bevel to the cutting edge of the finished sections, and represents angularly disposed stop members secured to the block and adapted to properly position the blanks as they are; placed thereon by the operator, as shown in 11. The head is adapted to receive two blanks 76 that are transposed from one side thereof to the other to complete the grinding operation of both edges of'the section. and '77 represents a trans blanks and secure them against movement during the grinding operation. The clamping movement of the jaw is controlled by means including a forwardly extending stud 80, integral with the block and its body portion slidably received by an opening 81 through the center of the head 48, and 82 represents a shell nut threaded upon the opposite end of the stud and receiving one end of a compression spring 83 that is operative between the head and shell in a manner to normally move the block 72 toward the head, and 8% represents a securing nut threaded upon the free end of the stud and adapted to engage with the contact screw '53 carried by the arms 52 when the head is rocked to a blank receiving "position.

The lower ends of the ribs d5 terminate in bosses 85, in which is secured a transverse shaft 86, and rockably mounted upon the shaft is a toggle yoke 87, having vertically disposed a'rms88, in which is secured a shaft 89 having the forked arms 90 of a toggle member 91 pivotally mounted thereon and including a threaded socket member 92 that operatively receives the lower threaded end of a rod 93, and 94 is a securin nut. The opposite end of the rod is threaded in a reverse way, and is received by a depending socket member 95 integral with the yoke 50, and 96 is a securing nut. 97 represents a couplingmember mounted upon the shaft 89 between the arms 90 and provided with a depending'lug 98 that engages with the end of ascrew 99 that is adjustably mounted upon the toggle yoke 87 and operative to limit the throw of the toggle members in a forward direction. 100- represents a rearwardly extending threaded socket member that is integral with the coupling member 97 and receives the threaded end of a rod 101, and 102 is a securing nut.

103 representsra longitudinally disposed bearing member-- integral with the main frame 1, and provided with bronze bushings 10% at its opposite ends, in-which is jour naled a shaft 105, having secured to its front end a cap 106 and to its opposite end a spur gear wheel 107 meshing with a pinion 108 integral with the spur gear wheel 109 secured to a shaft 110 journaled in bearings carried by a casing 111 forming part of the main frame 1, the gear 109 meshing with a pinion 112 journaled upon a shaft 113 that has its front end journaled in the frame of the machine and its rear end in an arm 114 secured to the frame, and secured to the shaft is a driving pulley 115. The pinion 112rota-tcs with a clutch sleeve 116 carrying a longitudinally movable clutch dog 11'? that is controlled by a clutch shipping lever 118.in the same manner as is shown in Figs, 10 and 11 of my Patent No. 1,042,259, issued October 22, 1912, the lever being provided with an arm 119-shown by dotted lines in Fig. 2, whereby it operatively connected with the upper'end of a link 120, the lower end of the link being adjustably connected with an arm 121 secured to the rear end of a rock shaft 122 journaled in the main frame. A tension spring 123 connects the arm with the frame in a manner to rock the shaft in a direction to cause the lever 118 to move to a clutch disengaging position and a foot lever 124 is secured to the opposite end of the shaft whereby the operator may trip the clutch into action, and 125 represents a stop member carried by the shaft and engaging with the frame in a manner to limit a rocking movement of the shaft under tension of the spring 123.

Journaled in bearings carried by the rear end of the frame of the machine, in the plane of the axis of the shaft 105, is a transversely disposed rock shaft 126 having an arm 127 secured thereto, upon the free end of which is journaled a coupling member .128, into which is threaded the rear end of the rod 101, and 129 represents asecurin nut. secured to the spur gear wheel 107 is a face cam'member 130. 131 represents a vertically disposed arm secured to the rock shaft 126, and 132- a roller journaled upon the free end of the armand adapted to engage with the face cam member 130 when the wheel 107 is rotated and to move into a ap 133 in the cam member at the end of eac rotation of the wheel, the shaft 126 being rocked-in a direction to cause the roller toenter the gap by means of a roller 134 journaled upon a radially disposed pm 135 carried b the wheel 107 and engage with a .cam trac 136 integral with the arm 127. Secured tothe rock shaft 126 is a vertically disposed arm 137, carrying at its free end a cam 138 that engages with a' heel 139 forming part of the clutch shipping lever 118 in a manner to hold the lever out of engagement with the clutch dog 117 when the roller 132 is riding upon the cam member 130 and topermit it to engage therewith when the roller enters the gap 133, whereby one complete revolution is imparted to the cam at each actuation of g the clutch mechanism.

Secured to the rear end of the hollow rockable cylinder 41 is an arm 140 carrying a stud 1 11, uponwhich is journaled a roller 142 that traverses, a multiple cam 143 mounted upon the front face of the spur gear wheel 107', whereby a rocking movement is imparted to the cylinder 41 and T ing said member transversely with respect to said abrasive element. 7

7. A grinding machine including an abrasive element, a blank carrying member,

- means for advancing said member toward said abrasive element and reciprocating said member transversely with respect to said abrasive element, and means for supplying cooling water automatically to said member in a controlled intermittent manner.

8. A grinding machine including an abrasive element, a blank carrying head, means for advancing said head toward or from said abrasive element, means for supplying cooling water to said head, and means whereby the supply of cooling water may be admitted to said head as it approaches the abrasive element and shut off when it recedes therefrom.

9. A grinding machine including an abra-' sive element, a blank carrying member, means for reciprocating said blank carrying member transversely with respect to said abrasive element, means for advancing step by step said blank carrying member toward said abrasiveelement, and means for automatically controlling a supply of cooling water to said blank carrying member. 7

10. A grinding machine including an abrasive element, a blank carrying head, means for moving said head toward or from said abrasive element, and means for supplying cooling water to said head, said means bein controlled by said head moving means.

11. A grindin machine including an abrasive element, a blank carrying head, means for moving said head toward or from said abrasive element, a chamber in said head having outlet ports leading toward said abrasive element, and means connecting said chamber with a source of cooling water supply, said means including spring-pressed plunger valve mechanism having its operation controlled by said head moving mechanism.

12. A grindin machine including an abrasive element, ailank carrying head, means for supporting and rocking said head toward or from said abrasive element, achamher in said head having outlet ports leading toward said abrasive element, a spring pressed plunger-valve communicating with said chamber, and a source of coolingwater supply, said valve being opened by engaging with said head supporting means when ,Said head is rocked toward said abrasive element. r

being released 13. Agrinding machine including an abrasive element, a blank carrying head, means for supporting and moving said head toward or from said abrasive element, and a movable blank clamping jaw coiiperating.

with said head and controlled by a to and fro movement thereof.

14. A grinding machine includ ng an abrasive element, a blank carrying head, means for supporting and moving, said head toward or from'said abrasive element, and a.

spring-pressed blank holding jaw cooperating with said head, said jaw by engaging with said head moving means.

15. A grinding machine including an abrasive element, an arm adapted to move'across the face of said abrasive element, a rocking blank carrying head pivotally. mounted being released upon said arm, means for rocking said head, and a spring-pressed blankholding jaw cooperating with said head, said jaw by contact with said head rocking means.

16...A grinding machine" including an abrasive element, an arm adapted to move across the face of said abrasiveelement, a

rocking blank carrying head pivotally mounted upon said arm, means for rocking said head, said means including a rockable arm pivotally connected with said head, and

a spring-pressed slidable blank holding jaw 7 carried by said head ahd coiiperating therewith, said aw being released by contact with said rockable arm.

17. A grinding machine including an abrasive element, a blank carrying head provided with grooves upon its face, a chamber in said head having outlet ports communicating with said grooves, a movable blank clamping jaw cotiperating with said head, a source of water supply under/pressure, and means for simult 'neously a'ctuating said clamping jaw and/ controlling the flow of water to said grooves whereby the flow of. water will operate to release the blanks when the movable jaw opens.

18. A grinding machine including a con stantly rotatable abrasive element, an arm adapted to vibrate across the face of said abrasive element, a rocking blank carrying head pivotally mounted upon said arm, an intermittently rotatable element having a plurality of cam races operatively connected with said vibratable arm, a face cam element rotatable in unison with said first cam element and divided into segments havin a variable rise, and operative connectionsietween said rocking blank carrying head and said face cam."

19. A grinding machine including a constantly rotatable-abrasive element, an arm adapted to vibrate across the face of said abrasive element, a rocking blank carrying intermittently rotatable element. having a plurality of cam races operatively connected with said vibratab'le arm, a race cam element rotatable with said first cam and divided into segments having a variable rise, and

operative connections between said rocking blank *arrying head and said face cam including a toggle mechanism.

20. A grinding machine including, in combination, a main frame, a slidable head adjustable longitudinally upon said :trame,,a spindle journaled in said head, an abrasive stone carriedby said spindle, a rockable longitudinally disposed cylinder journaled in said frame, a vertically disposed arm secured to the front end of said cylinder, a rocking blank carrying head mounted upon the upper end of said arm, a rotatable cam element journaled upon said tame and provided with a plurality of cam races, an arm secured to the opposite end of said cylinder, and a roller carried by the free end of. said arm and adapted to travel in. said cam races whereby a vibratory movement is imparted to said vertically disposed arm.

21. A grinding machine including, in, combination, a main frame, a. slidable head adjustable longitudinally upon said frame, a spindle journaled in said head, an abrasive stone carried by said spindle, a rock-able lone gitudinally disposed cylinder journaled. in said frame, a vertically disposed arm secured. to the front end of said cylinder, a rocking; blank carrying head mounted upon the upper end of said arm, a rotatable cam element journaled upon said frame and providcd. Wit i a plurality of cam aces, an' arin secured to the opposite end of said cylinder, a roller carried by the free end of said ari'n and adapted to travel. in said cam races whereby a i'iln'atory movement is imparted to said vertically disposed arm, a face cam rotatable with said first cam, a transversely disposed shaft iournaled upon said frame, an arm secured to said shaft and lmving its free end engaging with said face cam, toggle mechanism carried by said vertically disposed arm and operatively connected with said rocking blank hurrying head, a second arm secured to said transverse shaft, and a link connection between the free end of said second arm and said toggle mechanism.

22. A grinding machine inchiding, in combination, a main frame, a slidable head adjustable longitudinally upon said frame, a spindle journaled in said head, an abrasive stone carried by said spindle, means for ad justing said head upon said frame including a shaft having one end connected with s: d head, the opposite end of said shaft being threaded, a sleeve journaled upon the frame and receiving the threaded end of said shaft, a toothed Wheel secured to said sleeve. a hand lever movable angularly about the a i of said shaft, detcnt mechanism carried l i said hand lever and adapted to .agagge u" said toothed Wheel, and means whereby sale. hand lever ma y be given a measured throw,

In testimony whereof I afiix my signa re,

lVlLLlI-liiii C. OSEERHOL i, 

